Both players hinted at potential exits during the World Cup and Real Madrid are believed to be keen on them.
Courtois is the more likely to depart with just one year left on his contract but the Blues are confident Hazard will stay and are preparing to offer him a new deal.
But Sarri is yet to speak to them and hopes he can convince them both to stay.
“I will see them on Saturday for the first time – I don’t know the situation,” said Sarri.
We are talking about top players. Every club wants to keep their top players and we are trying to do it.”